Nut-lock.



M. G. COWHERD.

NUT LOCK.

APPLICATION FILED MAY 22, 1915.

1 1 5 1 ,OQO. Patented Aug. 24, 1915.

MOSES G. COWI-IERI), OF SULPHUR, KENTUCKY.

NUT-LOCK.

Specification of Letters Patent.

Patented Aug. 241:, 1915.

Application filed May 22, 1915. Serial No. 29,853.

To all whom it may concern: I,

Be it known that I, Mosns G. GOWHERD, a citizen of the United States, residing at Sulphur, in the county of Henry and State of Kentucky, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had to the accompanying drawings.

My present invention relates to new and useful improvements in nut locks and as one of its principal objects aims to provide a device of the above character which is of extremely simple construction and may, there fore, be cheaply manufactured.

Another genera-l object oi the invention is to provide a nut lock which is of such de sign that it may be easily and quickly applied to the nuts upon a bolt with a minimum expenditure of time and labor and may be readily removed therefrom.

A further object of the invention is to provide a nut lock which is formed from a single blank of sheet metal which is cut and shaped to provide a body plate and oppositely extending pairs of nut engaging wings which are adapted to embrace the two nuts threaded upon the bolt.

A further object of\ the invention is to so construct the device that the second pair of wings may be hammered down to embrace the second nut after this member has been applied to the bolt.

The above, and other incidental objects of a similar nature, which will be hereinafter more specifically treated are accomplished by such means as are illustrated in the accompanying drawings, described in he following specification, and then more particularly pointed out in the claim which is appended hereto and forms part of this application.

With reference to the drawings, wherein there has been illustrated the. preferred embodiment of this invention, as it is reduced to practice, and throughout the severzl views of which similar reference numerals designate corresponding par-ts, Figure 1 is a side elevation showing the locking device applied to a bolt and a pair of nuts threaded thereon; Fig. 2 is a detail perspective view of the locking device as it is preferably completed for use; Fig. 3 is a detail View of the blank of sheet metal from which the device is fashioned; and Fig. 4 is a view of a modified form of blank from which a modified form of the locking device may be con structed.

Briefly described, the nut lock of the present invention consists in a single blank-or plate ofsheet metal which is cut and shaped in a manner to be hereinafter explained, to provide a body plate which is adapted to surround the bolt and to be interposed between the two nuts thereon and oppositely directed pairs of nut engaging wings, of which the first pair is adapted to engage the inner nut and the second pair is adapted to embrace the outer nut and to be properly engaged therewith, after this nut has been placed upon the bolt and threaded home.

Referring now particularly to Figs. 1 and 2 of the accompanying drawings,wherein the locking device is most completely shown, the numeral 10 designates the body plate from opposite edges of which extend one pair of nut engaging wings 11 and from the remaining opposed edges of which extend a second pair of nut engaging wings, indicated at 12.

-As disclosed in Fig. 3 off the accompanying drawings, the body plate and wings are formed from a single blank of sheet metal of substantially circular conformation. This blank is first cut to form a centrally located bolt receiving opening 13 and is then provided at quadrantly spaced points, with radial slits 14. These slits: 14 extend from the corners of the field A, which as indicated in dotted lines in Fig. 3, defines the body plate of the device. This body plate is preferably of the same size as the nuts to which it is to be applied.

Before the manufacture of the device is complete, the wings 11 are bent, as shown in Fig. 2 to extend parallel to each other and at right angles to the body plate. The corners of the wings are bent to extend parallel to each other and at right angles to the wings to produce the lugs 15 which, when the device is applied to the first nut, are adapted to engage against opposite faces thereof. At this point, I desire to explain that while it is preferable to bend one pair of wings at right angles to the body plate, before the manufacture of the device is completed, this step may, of course, be omitted and all of the wings may be hammered into position to embrace the nuts on the bolt, after the nuts and the device are applied to the bolt.

The corners of the wings 12 are also bent ence will now be had particularly to Fig. 1

wherein the bolt is designated by the numeral 19 and the inner and outer nuts designated by the numerals 17 and 18 respectively. After the inner nut 17 has been applied to the bolt and threaded home, the body plate is slipped on the bolt and dis posed in engagement with the outer face of the nut 17. If the wings 11 have already, during the manufacture of the device, been extended at right angles to the body plate, they will, of course, engage against opposite faces of the nut, as in Fig. 1 while their lugs will also engage against opposite faces of the nut. As will be readily apparent the lugs serve to prevent the rotation of the body plate with respect to the nut 17. It should now be observed that when the device is first applied to the bolt, the wings 12 extend in a common plane and at right angles to the bolt. The nut 18 is next applied and threaded home on the bolt to engage against the body plate and to firmly clamp this member against the nut 17. A hammer or equivalent tool is then employed to bend the wings 12 so that they will extend at right angles to the body plate on opposite sides thereof from the wings 11 and will consequently engage against opposite faces of the outer or second nut 18. The lugs of the wings 12 will, of course, engage against the opposite faces of-the nut 18 so that this member also is held against rotation with respect to the body plate.

From the foregoing description taken in connection with the accompanying drawings, it will now be apparent that the nut lock of the present invention may be applied to a bolt for holding the head nut and the locking nut against rotation with respect to each other, so that it will be impossible for the working of the head nut to cause the unthreading of the locking nut. Also, it will be impossible for the locking nut to unthread, through jars and the like, since it is held against rotation by the locking device and cannot rotate, except upon the rotation of the head nut 17.

In reduction to practice, it has been found that the form of this invention illustrated in the drawings, and referred to in the above description as'the preferred embodiment, is the most efficient and practical; yet realizing. that the conditions concurrent with the adoption of this device will necessarily vary, it is desirable to emphasize the fact that various minor changes in the details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of this invention, as defined by the appended claim.

In concluding the description of my invention, I desire to have it particularly understood that the device may, when completely manufactured and ready for use, he formed as shown in Fig. 2, or in Fig. 3. If

applied to the bolt in the form in which it is shown in Fig. 3, ahammer or similar tool is employed to engage the wings 11 against the first nut 17 and to then bend the corners of the wing to engage against the opposite sides of the nut. The bending of the wings 12 will be accomplished in the manner previously explained after the second nut 18 has been applied.

What is claimed is r The combination with a bolt, and a pair of nuts threaded thereon, of a nut lock including a body plate mounted upon the bolt and interposed between the nuts, and opposed pairs of wings extending from the edges of the plate, one pair of wings being engageable with one of said bolts, the other MOSES G. COWI-IERD. i tnesses W. D. MORRIS, J. S. TURNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

